US2581474A - Self-centering chuck - Google Patents

Self-centering chuck Download PDF

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Publication number
US2581474A
US2581474A US56970A US5697048A US2581474A US 2581474 A US2581474 A US 2581474A US 56970 A US56970 A US 56970A US 5697048 A US5697048 A US 5697048A US 2581474 A US2581474 A US 2581474A
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US
United States
Prior art keywords
chuck
teeth
scroll plate
members
machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US56970A
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English (en)
Inventor
Evangelista Tullio
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US2581474A publication Critical patent/US2581474A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
    • B23B31/16—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving radially
    • B23B31/16004—Jaws movement actuated by one or more spiral grooves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
    • B23B31/16—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving radially
    • B23B31/16004—Jaws movement actuated by one or more spiral grooves
    • B23B31/16037—Jaws movement actuated by one or more spiral grooves using mechanical transmission through the spindle
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/19—Radially reciprocating jaws
    • Y10T279/1926—Spiral cam or scroll actuated

Definitions

  • My present invention relates to self-centering chucks.
  • One of the objects of my present invention is to provide a self-centering chuck in which the clamping members may be moved toward and away from each other while the chuck is rotating or when the chuck is stationary.
  • the chuck of my present invention may be used in conventional lathes, in turret lathes, automatic lathes, grinding machines of all types, or in machine tools where a quick replacement or shifting of the work is required or convenient while the machine tool is operating.
  • Another object of my present invention is to provide a chuck which overcomes the abovementioned undesirable characteristics by providing operating means for the chuck clamps which does not comprise parts which rotate and mesh with respect to each other during the operation of the machine, but instead rotate with the body of the chuck or remain stationary and have no parts moving relatively to the chuck during the operation of the machine.
  • a further object of my present invention is to provide a chuck which may be opened or closed by relatively short amounts during the operation thereof so as to permit the changing of the work piece while the machine is operating.
  • my present invention mainly consists of a chuck body having radially disposed guideways upon one side thereof a rotatably adjustable scroll plate in the chuck body having a plurality of spiral grooves upon one side thereof; a piurality of radially movable jaws upon the chuck body slidably guided in the radial guideways thereon and having inward projections corresponding to and meshing with the spiral grooves in the scroll plate; an axially displaceable member having at least one portion thereof disposed in the chuck body; a collar fixed on the scroll plate with at least a first helicoidal member fixed upon the collar and inclined in one direction with respect to the central axis of the chuck; an annular member in the chuck body substantially aligned with the collar with at least one further helicoidal member fixed thereon and inclined in another direction with respect to said central axis or the chuck; means for axially shifting the axially displaceable member; and a further annular member carried on the latter displaceable member
  • Fig. 1 is a longitudinal section through a selfcentering chuck constructed in accordance with my present invention
  • Fig.2 is a cross sectional view of part of the structure shown in Fig. 1;
  • Fig. 3 is a sectional plan view of part of the structure shown in Figs. 1 and 2;
  • Fig. 4 is a sectional view through another embodiment of a self-centering chuck constructed in-accordance with my present invention.
  • Fig. 5 is a transverse sectional view of the structure shown in Fig. 4.
  • elements I and 2 are support members which rotatably support the elongated tubular member 3 which is threadedly connected at one end to thechuck body.
  • Slidably supported within tubular member 3 is a tubular member t having the collar 5 located at one end thereof.
  • the pivotaily mounted lever 5 cooperates with a groove formed in the collar 5 so as to produce a longitudinal shifting of tubular member 4 within tubular member 3 upon oscillation of lever 5.
  • a coupling element 1 Threadedly connected to the other end of tubular member 4 is a coupling element 1 which supports the roller bearing 8.
  • a coupling element 1 Mounted on the other side of roller bearing 8 from couping ele ment 1 is an annular gear member 9 having mutually spaced helical gear teeth I U and II formed on the outer surface thereof.
  • the chuck body I! which is threadedly connected to tubular member 3 has three radial slots formed in the outer front face thereof and sup*- ports the three clamp members iii in these slots.
  • the lower sides of clamp members I5, as viewed in Fig. 1, have teeth formedtherein which 00- operate with the spiral groove formed in scroll plate member I4.
  • an annular gear member having internal helical teeth I2.
  • concentrically aligned with the above mentioned annular gear member is another annular gear member I6 having internal helical teeth I3.
  • the member I6 is fixedly mounted with respect to chuck body I'I.
  • Member I I with its depending annular gear is rotatably mounted with respect to member I6 by means of a roller bearing interposed between these two members, as shown in Fig. 1.
  • the helical teeth I2 and I3 are inclined in opposite direction with respect to the axis of tubular member 4, as is clearly shown in Fig. 2.
  • the cooperating tooth members of elements 9, I4 and I6 may take the form of pointed teeth 22 which are arranged close to each other, as shown in Fig. 3, spaced teeth 23, as shown in Fig. 3, or keys 2I cooperating with key ways as is also shown in Fig. 3.
  • the teeth I and II are located out of mesh with the teeth I2 and I3 so that the mechanism is in idle position.
  • the scroll plate I4 may be turned to any desired position so as to move clamp members I5 inwardly or outwardly by rotation of element 20 which is rotatably mounted in the chuck body and which has teeth thereon which cooperate with teeth on scroll plate I4 so that plate I4 may be rotated with respect to the other chuck parts, as is clearly shown in Fig. 1.
  • Element 20 has an opening formed therein by which it may be engaged for turning.
  • the scroll plate I4 may also be rotated to move clamp members I5 outwardly and inwardly during the operation of the machine or when the machine is idle by manipulation of lever 5. Assuming the parts are in a position shown in Fig. 1, the right hand end of lever 5 may be moved upwardly, as viewed in Fig. l, in order to move the tubular member 4 downwardly, as viewed in Fig. 1. This causes teeth I0 and II on rotatably mounted member 9 to respectively mesh with the helical teeth I2 and I3.
  • the teeth I3 may be replaced by straight key members or teeth which cooperate with teeth II so as to form suitable engagement with teeth II. This construction will produce a lesser rotation 4 of scroll plate I4 than is the case where helical teeth I3 are provided.
  • FIGs. 4 and 5 show a stationary housing 32 for the chuck actuating parts, a ring member 3
  • ring mem ber 3i Connected to ring mem ber 3i is the annular gear member 35 having inner spaced sets of teeth corresponding to tooth members III and II in the embodiment shown in Fig. 1.
  • Scroll plate member 3's is rotatably supported in the chuck body 35 and has cutwardly projecting teeth formed thereon which correspond to helical teeth I2 in the above de scribed embodiment.
  • Fixedly mounted in the chuck body 36 is the annular member 35 having outer helical teeth spaced from the first mentioned set of teeth and corresponding to helical teeth I3 in the above described embodiment.
  • Figs. 4 and 5 During the operation of the structure shown in Figs. 4 and 5 the elements 3%, S9 and 35 remain stationary Also, the construction shown in Figs. 4 and 5 may be operated either when the machine is idle or when the machine is running in order to actuate the clamping members of the chuck.
  • a rotatable chuck for a lathe or the like the combination of a chuck body having radially disposed guideways upon one side thereof; a rotatably adjustable scroll plate in the chuck body having a plurality of spiral grooves upon one side thereof; a plurality of radially movable iaws upon the chuck body slidably guided in the radial guideways thereon and having inward projections corresponding to and meshing with the spiral grooves in the scroll plate; an axially displaceable member having at least one portion thereof disposed in the chuck body; a collar fixed on the scroll plate with at least a first helicoidal member fixed upon the collar and inclined in one direction with respect to the central axis of the chuck; an.
  • annular memher in the chuck body substantially aligned with the collar with at least one further helicoidal member thereon and inclined in another direction with respect to said central axis of the chuck; means for axially shifting the axially displaceable member; and a further annular member carried on the latter displaceable member having integral means projecting thereon for simultaneously engaging with the first and further helicoidal members in axial direction of movement of said displaceable member to rotatably adjust said scroll plate and thereby correspondingly move said jaws in said radial. guideways.
  • a rotatable chuck for a lathe or the like, the combination of a chuck body having radially disposed guideways upon one side thereof; a rotatably adjustable scroll plate in the chuck body having a plurality of spiral grooves upon one side thereof; a plurality of radially movable jaws upon the chuck body slidably guided in the radial guideways thereon and having inward projections corresponding to and meshing with the spiral grooves in the scroll plate; an axially displaceable member having at least one portion thereof disposed in the chuck body; a collar fixed on the side of the scroll plate opposite to that carrying the spiral grooves; first helicoidal teeth fixed within the collar and inclined in one direction with respect to the central axis of the chuck; an annulus secured in the chuck body in substantial alignment with the collar; further helicoidal teeth fixed in the annulus and inclined :in another direction with respect to central axis of said chuck; means for axially shifting the axiaily displaceable member; an

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
US56970A 1947-11-05 1948-10-28 Self-centering chuck Expired - Lifetime US2581474A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT287638X 1947-11-05
IT130148X 1948-01-13

Publications (1)

Publication Number Publication Date
US2581474A true US2581474A (en) 1952-01-08

Family

ID=26326623

Family Applications (1)

Application Number Title Priority Date Filing Date
US56970A Expired - Lifetime US2581474A (en) 1947-11-05 1948-10-28 Self-centering chuck

Country Status (5)

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US (1) US2581474A (en))
BE (1) BE485653A (en))
CH (1) CH287638A (en))
FR (1) FR970032A (en))
GB (1) GB658108A (en))

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2905476A (en) * 1955-12-28 1959-09-22 United Greenfield Corp Controlled centering chuck
US4482163A (en) * 1982-09-29 1984-11-13 Litton Industrial Products, Inc. Spindle powered adjustable chuck
US5143686A (en) * 1989-01-05 1992-09-01 Tokichi Shimizu Chuck with four differential jaws
US6601485B2 (en) * 2001-05-24 2003-08-05 Paul R. Baldwin Dual brake rotor finishing system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1159239B (de) * 1958-02-24 1963-12-12 Richard Boeffel Mehrbackenspannfutter

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1608464A (en) * 1923-03-23 1926-11-23 E Horton & Son Company Chuck
US1713796A (en) * 1929-05-21 Chuck
US2358049A (en) * 1941-06-07 1944-09-12 Warner Swasey Co Work gripping device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1713796A (en) * 1929-05-21 Chuck
US1608464A (en) * 1923-03-23 1926-11-23 E Horton & Son Company Chuck
US2358049A (en) * 1941-06-07 1944-09-12 Warner Swasey Co Work gripping device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2905476A (en) * 1955-12-28 1959-09-22 United Greenfield Corp Controlled centering chuck
US4482163A (en) * 1982-09-29 1984-11-13 Litton Industrial Products, Inc. Spindle powered adjustable chuck
US5143686A (en) * 1989-01-05 1992-09-01 Tokichi Shimizu Chuck with four differential jaws
US6601485B2 (en) * 2001-05-24 2003-08-05 Paul R. Baldwin Dual brake rotor finishing system

Also Published As

Publication number Publication date
CH287638A (fr) 1952-12-15
GB658108A (en) 1951-10-03
FR970032A (fr) 1950-12-28
BE485653A (en))

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